Fog-whistle



No. 606,668. Patented 1u|y.5, |898.

s. H HuNTI-m.

Foc WHISTLE. (Application filed Dec. 1,A 1897.)

(No Model.)

UNITED STATES#v PATENT sILAs H. HUNTER, or CLEVELAND, OHIO.

Foc-WHISTLE. e

SPECIFICATION forming part of Letters Patent No. 606,668, dated July 5,1898. e

Application led December 1, 1897.d Serial No. 660,341. (No model.)

To L ZZ whom itin/bag concern:

Be it known' that I," SILAS H. HUNTER, of Cleveland, Cuyahoga county',-Ohio, have invented certain new and useful Improvements in Fog-Whistles;and I dohereby declare the'V following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it pertains to make and use the same.

My inventionrrelates to fog-whistles; and

it consists in the peculiar construction of the same, aswill behereinafter fully set forth and claimed.

' In the drawing the iigure is a view in vertical section of a whistleembodying my invention. l

A represents a steam-pipe leading from a steam-boiler and provided witha Valve B, operated in the usual, manner. To the upper end of'pipe A issecured a pipe T-fitting C, the branches c c' being so secured to pipe Aas to be vertical and the branch c2 being preferably formed larger thanbranches c c and extending in a horizontal direction. The branches c,c', and c2 of the T-ittin g are screwthreaded, and the lower branch c isscrewed on pipe A. The branch c is provided with a plug D, screwedtherein, the aforesaid plug D extending upward, forming ashaft D', thefunction of which will be hereinafter fully set forth.

Screwed into the branch c2 of the T-tting C is a flaring hollow castingE, provided at its contracted end with a spider E', the hub e of whichis internally screw-threaded to receive the screw-threaded stem fof theflaring I diaphragm E! The outer circumference of the uppefn ofdiaphragm F is slightly less than the` inner circumference of the upperend of the casting E, thus forming the steamy ports f of the whistle.The bell or sounding-c linder G is secured in proper relationto'fhelpmwly means of a spindle F', which extends out from diaphragm Fand is screwthreaded at its outer end f3. The bell G is provided with afemale screw-thread g, which engages Vthe screw-thread f3, and a jam-nutg2, securing the parts tightly together and in proper relation. y

I-I represents a trumpet formed steam or air tight except at its mouthor outlet, which surrounds the whistle-bell G, thus intensifying thesound and projecting it in the desired direction. The object or purposeof surrounding the whistle with a steam or air tight metallic drum orcover is the forcingor projecting the sound of the .whistle through thedense atmosphere which is caused by a fog. After a number of experimentsit has been found that the forcing'or projecting of the sound from a'steam-whistle is best accomplished -by providing a steam-tight( trumpetor cover which surrounds the whistle and Vwhich is greater in lengththan the whistlebell andextends beyond'thegsaid bell. The base orcontracted end ofthe trumpet II is screw-threaded internally, as ath,the said screw-thread h engaging an external screwthread c' on theexterior of casting E, thus making the casting E the base of the trumpetand holding the same in position and in relation to the bell G. By theabove construction and arrangement the sound ofthe whistle isconcentrated and projected in the desired direction, and also thetrumpet being formed of sonorous metal," such asrcopper or aluminium,the vibration ofthe sounding cylinder or bell is impartedl to thetrumpet, and thus the sound isintensiiied. Y

Inasmuch as the force of the steam as it issues from the port j" is verygreat and the vibrations are also very high, Ifmd it necessary toprovide guys J J', thelower guyJ betrumpet, as at j, and at the otherend to the steam-pipe A, as at j. The upper guy J is secured at one endto the mouth of the trumpet, as a't jg, and at the other end is securedto the upper end of shaft D'. The guys brace the trumpet and keep itsteady, or, as Vfar as possible, free from undue vibration.

ving secured at one end to the mouth ofthe In a fog-whistle constructedaccording to my invention the distance to which the sound is carried ina given direction is far greater than in whistles of the ordinaryconstruction, and the Whistle being projected in a horizontal directionand surrounded by the trumpet the sound is intensified and is alsoprojected in the desired direction. f

What I claim is- 1. A fog-whistle comprising a steam-feed pipe, asuitable steam port and a bell or sounding-cylinder, the said bell orsoundingcylinder being inclosed by a trumpet, said IOO trumpet beingopen only at its mouth or forward end, substantially as and for thepurpose shown and described.

2. In a fog-Whistle, the combination With the Whistle-bell of a steam orair tight trumpet open only at its mouth or forward end, said trumpetsurrounding the said bell, substantially as and for the purpose shownand set forth.

In a fog-Whistle, the combination with the Whistle including thesounding-bell and a steam-supply pipe and suitable ports, of a steam orair tight trumpet surrounding the said bell or souudine-cylinder, thetrumpet provided with sustaining-guys secured at the mouth of saidtrumpet at one end and at the opposite end to suit-able supportssubstantially as aud for the purpose shown and described.

it. In a fog-Whistle, the combination with the whistle proper, of atrumpet surrounding the bell of the said whistle, the said trumpetbeing` internally screw-threaded at its inner or contracted end, and anexternal ser-ewthread on the Whistle proper, and engagingr the internalscrew-thread of the trumpet, whereby the trumpet is held in properrelation to the Whistle proper, substantially as shown and deserbed.

5. In a fog-whistle, the Combination with the pipe A, T-fitting C, plugD with shaft D' fitting,r into the upper end of the T-fitting, Casting Eand diaphragm F, bell G and trumpet II surrounding the bell G, andprovided with guys .I J eonneeted at one end to the mouth of the trumpetand at the other end, respectively, to the steam-pipe A and the shaftD', all operating substantially as and for the purpose shown anddescribed.

In testimony whereof I sign this specification, in the presence of twoWitnesses, this 10th day of November, 1897.

SILAS II. IIUNHER. lVitnesses:

W. E. DONNELLY, ELLA E. TILDEN.

